One of Escher's fascinations was the animation of an abstract concept. Here, the reptiles come to life as they crawl out of the artist's depiction of a drawing, only to return to it. Escher wrote of this print, "evidently one of the reptiles has tired of lying flat and rigid amongst his fellows, so he puts one plastic-looking leg over the edge [and] wrenches himself free...." The name "JOB" on the booklet at lower left does not indicate the biblical character but refers to a brand of Belgian cigarette papers.